Cooking stove



De@ 3Q, 1924. Lszoo? J. E. CHAMBERS v COOKING STOVE Filed March 10, 1924 m4.

Patented Bee. 30, 1924.

PATENT JOI-IN E. CHAMBERS, OF SHELBYVILLE, INDIANA.

COOKING STOVE.

Application led March 10, 1924. Serial No. 698,000.

To @ZZ whom t may concern:

Be it known that I, JOHN E. CHAMBERS., a citizen of the United States, residing at Shelbyville, in the county of Shelby Vand State of Indiana, have invented a new and useful Cooking Stove, of which the following is a specification. y

It is the object of my invention to provide a simple, eective, and unobtrusive interlocking arrangement between the operating means for a lireless-cooker hood of a gas stove, and the gas-valve which con'- trols the flame beneath such hood.

My present invention is to some extent a development and improvement on that shown in my prior Patent No. 1,469,890, granted October 9, 1923.

In carrying out my present invention, I provide a vertically movable tireless-cooker hood which is mounted to be moved down into position to cover a cooking utensil on the gas stove or up to clear such cooking utensil; and counter-weight such hood so that it tends to spring toward either of f these positions after it hasapproached fairly close to that position; and I provide an operating handle or crank for the front of the stovev for operating this tirelesscooker hood to either of its positions. This operating handle is associated with a special locking device on the stem of the gas-valve which controls the flame beneath the location of the reless-cooker hood; to prevent the complete letting down of the hood onto the table of the gas stove unless the gas is turned out, and to prevent the turning on of such gas unless the hood has been raised from its lowermost position.

The `accompanying drawing illustrates my invention: Fig. 1 is a fragmental front elevation of a gas range equippedwith my invention, showing only such parts of the range as are necessary for the understand-v ing of the present invention; Fig. 2 is an enlarged elevation of the interlocking mechanism between the hood-operating lever and the gas-valve, showingy the parts in a different position from that in which they are shown in 1; and Fig. 3 is a fragmental plan of the mechanism shown in Fig. 2, showing in different kinds of lines the parts in dilferent positions.

The gas stove may be of any desired type, and has the usual cooking-table 11 on which there may be anyv number of burners, as is common in Vgas ranges. These various burners of the cooking table 11 may he controlled by the usual valves, shown in Fig. 1.; but the only valve with which the present invention is concerned is the valve 12 farthest toward the right, which controls the gas flame of the burner with which a vertically movable tirelesscooker hood 13 co-operates.

This hood 13 is hung on a chain 14 so that it is vertically movable from the uppermost dotted-line posit-ion shown to the lowermost dotted-line position shown, in which latter position it is upon the cooking table 11. This hood 13 is a heat-insulated cylinder open at the bottom but closed at thek top, so that it may slip down over any desired cooking utensil which may be over the hole for which the valve 12 controls the flame.

The chain 14 passes up from the hood 13 and over suitable pulleys 15 at the top of the framework of the stove, and then down to a double-eccentric device 16. l This double-eccentric device comprises two halfdisks mounted on a shaft 17; but the two half-disks are oppositely eccentric on said shaft. The'chain 14 from thehood 1,3 co-operates with the half-disk 18, around which the chain 14 wraps or unwraps as the shaft 17 is turned. The other'halfdisk 19 co-operates with a chain 20 leading to a counter-weight 21, the chain 20y wrapping and unwrapping around its half-disk 19 as the chain `14 unwraps and wraps r'espec tively around its half-disk 19. By reason of the opposite eccentricities of'4 the two halfdisks, the leverages of the respective chains associated with said half-disks are increased as the chains are respectively 11nwound, and decreased as the chains are respectively wound; so that when the chain 14 is unwound or nearlyr so the weight of the hood 13 has a mechanical advantage over the counter-weight 21 suificientto tend tol move the hood downward into close contact with thecooking table 11; while when thevchain 2O is unwound or nearlyv so, the mechanical advantage is the other way around, and the counter-weight 21 tends to move the hood 13 up against the top of the framework of the stove, or to the upper dotted-line position shown.

This arrangement of eccentric half-disks just described, however, isnot new with. this present invention, but is set forth in my aforesaid prior Patent No. 1,469,890.

On the front end of the shaft 17 is an operating lever 25, provided with an operating handle 26. This operating handle lies below the gas-supply pipe 27 which supplies the various gas valves, including the gas valve 12; and is conveniently in the same vertical plane of such gas-supply pipe 27, so that it is out of the way, and so that such gas-supply pipe may serve as a stop for the movement of the lever 25. This lever 25 swings in a vertical plane from the full line position shown in Fig. 2 through the adjacent dotted-line position to the dotted line position substantially opposite the full-line position. In Fig. 3, the full-line position of the lever 25 corresponds to the rstnamed dotted line position of Fig. 2; and the chain-line position in Fig. 3 of such lever corresponds to the last-named dotted-line position of Fig. 2.

On the lower end of the stem 30 of the valve 12 is an arm 31, which at its outer end is provided with a vertical hole through it for receiving a spool 32, the middle portion of which has a sliding fit in such hole. This spool 32 co-operates with the lever 25 -lVhen the operating handle 33 of the gas valve 12 is turned to the gas-admitting position shown in full lines in Fig. 3, and also shown in Fig. 1, the arm 31 is in the position shown in full lines in Fig. 3 and the position shown in Fig. 1, so that the spool 32 lies in a position to stop the clockwise movement of the lever 25. This clockwise movement of the lever 25 is the hood-lowering movement thereof. In such clockwise movement of the lever 25, to lower the hood, the upper or clockwise edge of the lever 25 encounters the lower end of the spool 32 when the hood reaches the full line position shown in Fig. 1, or shortly before such hood is seated on the cooking table 1,1. The spool 32 is slightly raised by the lever 25, but strikes the under side of the gas-supply pipe 27, as indicated in dotted lines in Fig. 2, and prevents further clockwise movement of said lever 25. This prevents the hood 13 from being lowered beyond the full line position shown in Fig 1 so long as the gasvalve 12 is open. However, if now the gas-valve 12 is closed, by moving the handle 33 i`rom the full line position of Figs. 1 and 3 to the dotted line position of Fig. 3 (or the 'full line position of Fig. 2), the spool 32 is moved from above the lever 25, to the full line position of Fig. 2 or the dotted line position oi" Fig. 3, thus leaving such lever 25 free for further clockwise movement. This further clockwise movement of the lever 25 occurs automatically by reason of the weight of the hood 13 as the opposite eccentricity of the half-disks 18 and 19 causes the weight of the hood to have a mechanical advantage over the weight of the counterweight; so that the hood then moves downward automatically to the lowermost dotted line position shown in Fig. 1, and the lever 25 moves upward to the full-line position shown in Fig. 2. The gas, however, is now shut ofi- The cooking beneath the hood 13 continues, without gas flame, by the entrapped heat in the material being cooked; which heat is held from dissipation by the tireless-cooker hood 13. The gas-valve 12, however, cannot now be turned on while the hood 13 is down; for when the handle 33 was turned to the position shown in Fig. 2, the spool 32 drops behind the lever 25, as is clear from Fig. 2 and the dotted-line position of Fig. 3, and thus prevents the stem 30 of the gas-valve 12 from being turned to open such valve. Before the valve 12 can be opened, therefore, it is necessary to operate the handle 26 in a counter-clockwise direction, so that the lever 25 will clear the lower end of the spool 32; and this operation must be sufficient to lift the hood 13 somewhat above the full-line position shown in Fig. 1, because of the fact that the spool 32 has dropped as :tar as permitted in its hole in the arm 31.

Thus the hood 13 cannot be fully lowered while the gas is on; and the gas cannot be turned on until the hood 13 has been raised from its lowermost position, and raised farther than its limiting downward position when the gas-valve 12 is turned on.

I claim as my invention 1. In a gas range, a vertically movable ireless-cooker hood, an operating lever therefor, a gas-valvefor controlling a gas flame below the tireless-cooker-hood location, an interlocking means between said hood-operating means and said gas-valve for limiting the downward movement ot said hood while the gas-valve is open and for requiring the hood to be raised higher than said limiting position before the gas valve when once closed can be re-opened.

2. In a cooking stove, the combination of a gas burner, a tireless-cooker hood vertically movable over said gas burner, a gasvalve for said gas burner, said gas-valve being provided at its lower end with a projecting stop-arm, and an operating arm for moving said hood vertically, said stop-arm and said operating arm being arranged to co-operate to prevent the complete lowering of said hood except when said gas-valve is closed.

3. In a cooking stove, the combination oi a gas burner, a tireless-cooker hood vertically movable over said gas burner, a gas- 1 valve for said gas burner, said gas-valve being provided with a projecting stop-arm, an operating arm for moving said hood vertically, and anabutment, said stop-arm being arranged when the gas-valve is open to be interposed between said abutment and said operating arm to prevent the complete lowering of said hood.

4L. In a cooking stove7 the combination of a gas burner, a tireless-cooker hood vertically movable over said gas burner, a gasvalve for said gas burner, said gas-valve being provided with a projecting stop-arm, an operating arm for moving said hood vertically, said stop arm and said operating arm being arranged to co-operate to prevent the complete lowering of said hood except when said gas-valve is closed and to lie behind the operating arm and held from valve-opening movement thereby when the gas-valve is closed and the hood is at or near its lowermost position.

5. In a cooking stove, the combination of a gas burner, a tireless-cooker hood vertically movable over said gas burner, a gasvalve for said gas burner, said gas-valve being provided with a projecting stop-arm, an operating arm for moving said hood vertically, and an abutment, said stop-arm being arranged when the gas-valve is open to be interposed between said abutment and said operating arm to prevent the complete lowering of said hood and to lie behind the operating arm and held from valve-opening movement thereby when the gas-valve is closed and the hood is at or near its lowermost position.

6. In a cooking stove, the combination of a gas burner, a tireless-cooker hood vertically movable over said gas burner, a gasvalve for said gas burner, saidgas-valve being' provided with a projecting stop-arm, an operating arm for moving said hood vertically, said stop arm and said operating arm being arranged to co-operate to prevent the complete lowering of said hood except when said gas-valve is closed and to lie beproper under the aforesaid different conditions to require the hood to be lifted higher in order to permit opening of the gas-valve than the position in which it is stopped in its lowering movement when the gas-valve is open.

7. In a cooking-stove, the combination of a gas burner,' a tireless-cooker hood vertically movablcover said gas burner, a gasvalve for said gas burner, said gas-valve being provided with a projecting stop-arm, an operating arm for moving said hood vertically7 and an abutment, said stop-arm being arrangedv when the gas-valve is open to be interposed between said abutment andv said operating arm to prevent the complete lowering of said hood and to lie behind the operating arm and held from valve-opening movement thereby when the gas-valve is closed and the hood is at or near its lowermost position, said stop-arm being provided with a part which directly eo-operates with said operating arm and said abutment and which takes different positions relative to the stop-arm proper under the aforesaid different conditions to require the hood to be lifted higher in order to permit opening of the gas-valve than the position in which it is stopped in its lowering movement when the gas-valve is open.

In witness whereof, I have hereunto set my hand at Shelbyville, Indiana, this 7th day of March, A. D. one thousand nine hundred and twenty-four; i

` JOHN E. CHAMBERS. 

